ported example plugin to gobject

Original commit message from CVS:
ported example plugin to gobject
This commit is contained in:
Erik Walthinsen 2001-06-24 23:50:01 +00:00
parent 041bec4751
commit 01e05ff187
4 changed files with 82 additions and 84 deletions

View file

@ -100,8 +100,8 @@ static void gst_example_init (GstExample *example);
static void gst_example_chain (GstPad *pad, GstBuffer *buf); static void gst_example_chain (GstPad *pad, GstBuffer *buf);
static void gst_example_set_arg (GtkObject *object,GtkArg *arg,guint id); static void gst_example_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_example_get_arg (GtkObject *object,GtkArg *arg,guint id); static void gst_example_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
/* These hold the constructed pad templates, which are created during /* These hold the constructed pad templates, which are created during
* plugin load, and used during element instantiation. * plugin load, and used during element instantiation.
@ -123,29 +123,29 @@ static guint gst_example_signals[LAST_SIGNAL] = { 0 };
* register the type, providing the name of the class, struct sizes, * register the type, providing the name of the class, struct sizes,
* and pointers to the various functions that define the class. * and pointers to the various functions that define the class.
*/ */
GtkType GType
gst_example_get_type(void) gst_example_get_type(void)
{ {
static GtkType example_type = 0; static GType example_type = 0;
if (!example_type) { if (!example_type) {
static const GtkTypeInfo example_info = { static const GTypeInfo example_info = {
"GstExample", sizeof(GstExampleClass), NULL,
NULL,
(GClassInitFunc)gst_example_class_init,
NULL,
NULL,
sizeof(GstExample), sizeof(GstExample),
sizeof(GstExampleClass), 0,
(GtkClassInitFunc)gst_example_class_init, (GInstanceInitFunc)gst_example_init,
(GtkObjectInitFunc)gst_example_init,
(GtkArgSetFunc)NULL, /* These last three are depracated */
(GtkArgGetFunc)NULL,
(GtkClassInitFunc)NULL,
}; };
example_type = gtk_type_unique(GST_TYPE_ELEMENT,&example_info); example_type = g_type_register_static(GST_TYPE_ELEMENT, "GstExample", &example_info, 0);
} }
return example_type; return example_type;
} }
/* In order to create an instance of an object, the class must be /* In order to create an instance of an object, the class must be
* initialized by this function. GtkObject will take care of running * initialized by this function. GObject will take care of running
* it, based on the pointer to the function provided above. * it, based on the pointer to the function provided above.
*/ */
static void static void
@ -154,41 +154,40 @@ gst_example_class_init (GstExampleClass *klass)
/* Class pointers are needed to supply pointers to the private /* Class pointers are needed to supply pointers to the private
* implementations of parent class methods. * implementations of parent class methods.
*/ */
GtkObjectClass *gtkobject_class; GObjectClass *gobject_class;
GstElementClass *gstelement_class; GstElementClass *gstelement_class;
/* Since the example class contains the parent classes, you can simply /* Since the example class contains the parent classes, you can simply
* cast the pointer to get access to the parent classes. * cast the pointer to get access to the parent classes.
*/ */
gtkobject_class = (GtkObjectClass*)klass; gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass; gstelement_class = (GstElementClass*)klass;
/* The parent class is needed for class method overrides. */ /* The parent class is needed for class method overrides. */
parent_class = gtk_type_class(GST_TYPE_ELEMENT); parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
/* Here we add an argument to the object. This argument is an integer, /* Here we add an argument to the object. This argument is an integer,
* and can be both read and written. * and can be both read and written.
*/ */
gtk_object_add_arg_type("GstExample::active", GTK_TYPE_INT, g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_ACTIVE,
GTK_ARG_READWRITE, ARG_ACTIVE); g_param_spec_int("active","active","active",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
/* Here we add a signal to the object. This is avery useless signal /* Here we add a signal to the object. This is avery useless signal
* called asdf. The signal will also pass a pointer to the listeners * called asdf. The signal will also pass a pointer to the listeners
* which happens to be the example element itself */ * which happens to be the example element itself */
gst_example_signals[ASDF] = gst_example_signals[ASDF] =
gtk_signal_new("asdf", GTK_RUN_LAST, gtkobject_class->type, g_signal_newc("asdf", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
GTK_SIGNAL_OFFSET (GstExampleClass, asdf), G_STRUCT_OFFSET (GstExampleClass, asdf), NULL, NULL,
gtk_marshal_NONE__POINTER, GTK_TYPE_NONE, 1, g_cclosure_marshal_VOID__POINTER, G_TYPE_NONE, 1,
GST_TYPE_EXAMPLE); GST_TYPE_EXAMPLE);
gtk_object_class_add_signals (gtkobject_class, gst_example_signals,
LAST_SIGNAL);
/* The last thing is to provide the functions that implement get and set /* The last thing is to provide the functions that implement get and set
* of arguments. * of arguments.
*/ */
gtkobject_class->set_arg = gst_example_set_arg; gobject_class->set_property = gst_example_set_property;
gtkobject_class->get_arg = gst_example_get_arg; gobject_class->get_property = gst_example_get_property;
} }
/* This function is responsible for initializing a specific instance of /* This function is responsible for initializing a specific instance of
@ -277,8 +276,8 @@ gst_example_chain (GstPad *pad, GstBuffer *buf)
gst_pad_push(example->srcpad,outbuf); gst_pad_push(example->srcpad,outbuf);
/* For fun we'll emit our useless signal here */ /* For fun we'll emit our useless signal here */
gtk_signal_emit (GTK_OBJECT (example), gst_example_signals[ASDF], g_signal_emit(G_OBJECT (example), gst_example_signals[ASDF], 0,
example); example);
/* If we're not doing something, just send the original incoming buffer. */ /* If we're not doing something, just send the original incoming buffer. */
} else { } else {
@ -290,7 +289,7 @@ gst_example_chain (GstPad *pad, GstBuffer *buf)
* enable the element to respond to various arguments. * enable the element to respond to various arguments.
*/ */
static void static void
gst_example_set_arg (GtkObject *object,GtkArg *arg,guint id) gst_example_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{ {
GstExample *example; GstExample *example;
@ -301,14 +300,14 @@ gst_example_set_arg (GtkObject *object,GtkArg *arg,guint id)
example = GST_EXAMPLE(object); example = GST_EXAMPLE(object);
/* Check the argument id to see which argument we're setting. */ /* Check the argument id to see which argument we're setting. */
switch (id) { switch (prop_id) {
case ARG_ACTIVE: case ARG_ACTIVE:
/* Here we simply copy the value of the argument to our private /* Here we simply copy the value of the argument to our private
* storage. More complex operations can be done, but beware that * storage. More complex operations can be done, but beware that
* they may occur at any time, possibly even while your chain function * they may occur at any time, possibly even while your chain function
* is running, if you are using threads. * is running, if you are using threads.
*/ */
example->active = GTK_VALUE_INT(*arg); example->active = g_value_get_int (value);
g_print("example: set active to %d\n",example->active); g_print("example: set active to %d\n",example->active);
break; break;
default: default:
@ -318,7 +317,7 @@ gst_example_set_arg (GtkObject *object,GtkArg *arg,guint id)
/* The set function is simply the inverse of the get fuction. */ /* The set function is simply the inverse of the get fuction. */
static void static void
gst_example_get_arg (GtkObject *object,GtkArg *arg,guint id) gst_example_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{ {
GstExample *example; GstExample *example;
@ -326,12 +325,12 @@ gst_example_get_arg (GtkObject *object,GtkArg *arg,guint id)
g_return_if_fail(GST_IS_EXAMPLE(object)); g_return_if_fail(GST_IS_EXAMPLE(object));
example = GST_EXAMPLE(object); example = GST_EXAMPLE(object);
switch (id) { switch (prop_id) {
case ARG_ACTIVE: case ARG_ACTIVE:
GTK_VALUE_INT(*arg) = example->active; g_value_set_int (value, example->active);
break; break;
default: default:
arg->type = GTK_TYPE_INVALID; G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break; break;
} }
} }
@ -345,7 +344,7 @@ plugin_init (GModule *module, GstPlugin *plugin)
GstElementFactory *factory; GstElementFactory *factory;
/* We need to create an ElementFactory for each element we provide. /* We need to create an ElementFactory for each element we provide.
* This consists of the name of the element, the GtkType identifier, * This consists of the name of the element, the GType identifier,
* and a pointer to the details structure at the top of the file. * and a pointer to the details structure at the top of the file.
*/ */
factory = gst_elementfactory_new("example", GST_TYPE_EXAMPLE, &example_details); factory = gst_elementfactory_new("example", GST_TYPE_EXAMPLE, &example_details);

View file

@ -60,7 +60,7 @@ struct _GstExampleClass {
}; };
/* Five standard preprocessing macros are used in the Gtk+ object system. /* Five standard preprocessing macros are used in the Gtk+ object system.
* The first uses the object's _get_type function to return the GtkType * The first uses the object's _get_type function to return the GType
* of the object. * of the object.
*/ */
#define GST_TYPE_EXAMPLE \ #define GST_TYPE_EXAMPLE \
@ -69,21 +69,21 @@ struct _GstExampleClass {
* is not the right type, a warning will be generated on stderr. * is not the right type, a warning will be generated on stderr.
*/ */
#define GST_EXAMPLE(obj) \ #define GST_EXAMPLE(obj) \
(GTK_CHECK_CAST((obj),GST_TYPE_EXAMPLE,GstExample)) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_EXAMPLE,GstExample))
/* The third is a checking cast of the class instead of the object. */ /* The third is a checking cast of the class instead of the object. */
#define GST_EXAMPLE_CLASS(klass) \ #define GST_EXAMPLE_CLASS(klass) \
(GTK_CHECK_CLASS_CAST((klass),GST_TYPE_EXAMPLE,GstExample)) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_EXAMPLE,GstExample))
/* The last two simply check to see if the passed pointer is an object or /* The last two simply check to see if the passed pointer is an object or
* class of the correct type. */ * class of the correct type. */
#define GST_IS_EXAMPLE(obj) \ #define GST_IS_EXAMPLE(obj) \
(GTK_CHECK_TYPE((obj),GST_TYPE_EXAMPLE)) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_EXAMPLE))
#define GST_IS_EXAMPLE_CLASS(obj) \ #define GST_IS_EXAMPLE_CLASS(obj) \
(GTK_CHECK_CLASS_TYPE((klass),GST_TYPE_EXAMPLE)) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_EXAMPLE))
/* This is the only prototype needed, because it is used in the above /* This is the only prototype needed, because it is used in the above
* GST_TYPE_EXAMPLE macro. * GST_TYPE_EXAMPLE macro.
*/ */
GtkType gst_example_get_type(void); GType gst_example_get_type(void);
#ifdef __cplusplus #ifdef __cplusplus

View file

@ -100,8 +100,8 @@ static void gst_example_init (GstExample *example);
static void gst_example_chain (GstPad *pad, GstBuffer *buf); static void gst_example_chain (GstPad *pad, GstBuffer *buf);
static void gst_example_set_arg (GtkObject *object,GtkArg *arg,guint id); static void gst_example_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_example_get_arg (GtkObject *object,GtkArg *arg,guint id); static void gst_example_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
/* These hold the constructed pad templates, which are created during /* These hold the constructed pad templates, which are created during
* plugin load, and used during element instantiation. * plugin load, and used during element instantiation.
@ -123,29 +123,29 @@ static guint gst_example_signals[LAST_SIGNAL] = { 0 };
* register the type, providing the name of the class, struct sizes, * register the type, providing the name of the class, struct sizes,
* and pointers to the various functions that define the class. * and pointers to the various functions that define the class.
*/ */
GtkType GType
gst_example_get_type(void) gst_example_get_type(void)
{ {
static GtkType example_type = 0; static GType example_type = 0;
if (!example_type) { if (!example_type) {
static const GtkTypeInfo example_info = { static const GTypeInfo example_info = {
"GstExample", sizeof(GstExampleClass), NULL,
NULL,
(GClassInitFunc)gst_example_class_init,
NULL,
NULL,
sizeof(GstExample), sizeof(GstExample),
sizeof(GstExampleClass), 0,
(GtkClassInitFunc)gst_example_class_init, (GInstanceInitFunc)gst_example_init,
(GtkObjectInitFunc)gst_example_init,
(GtkArgSetFunc)NULL, /* These last three are depracated */
(GtkArgGetFunc)NULL,
(GtkClassInitFunc)NULL,
}; };
example_type = gtk_type_unique(GST_TYPE_ELEMENT,&example_info); example_type = g_type_register_static(GST_TYPE_ELEMENT, "GstExample", &example_info, 0);
} }
return example_type; return example_type;
} }
/* In order to create an instance of an object, the class must be /* In order to create an instance of an object, the class must be
* initialized by this function. GtkObject will take care of running * initialized by this function. GObject will take care of running
* it, based on the pointer to the function provided above. * it, based on the pointer to the function provided above.
*/ */
static void static void
@ -154,41 +154,40 @@ gst_example_class_init (GstExampleClass *klass)
/* Class pointers are needed to supply pointers to the private /* Class pointers are needed to supply pointers to the private
* implementations of parent class methods. * implementations of parent class methods.
*/ */
GtkObjectClass *gtkobject_class; GObjectClass *gobject_class;
GstElementClass *gstelement_class; GstElementClass *gstelement_class;
/* Since the example class contains the parent classes, you can simply /* Since the example class contains the parent classes, you can simply
* cast the pointer to get access to the parent classes. * cast the pointer to get access to the parent classes.
*/ */
gtkobject_class = (GtkObjectClass*)klass; gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass; gstelement_class = (GstElementClass*)klass;
/* The parent class is needed for class method overrides. */ /* The parent class is needed for class method overrides. */
parent_class = gtk_type_class(GST_TYPE_ELEMENT); parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
/* Here we add an argument to the object. This argument is an integer, /* Here we add an argument to the object. This argument is an integer,
* and can be both read and written. * and can be both read and written.
*/ */
gtk_object_add_arg_type("GstExample::active", GTK_TYPE_INT, g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_ACTIVE,
GTK_ARG_READWRITE, ARG_ACTIVE); g_param_spec_int("active","active","active",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
/* Here we add a signal to the object. This is avery useless signal /* Here we add a signal to the object. This is avery useless signal
* called asdf. The signal will also pass a pointer to the listeners * called asdf. The signal will also pass a pointer to the listeners
* which happens to be the example element itself */ * which happens to be the example element itself */
gst_example_signals[ASDF] = gst_example_signals[ASDF] =
gtk_signal_new("asdf", GTK_RUN_LAST, gtkobject_class->type, g_signal_newc("asdf", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
GTK_SIGNAL_OFFSET (GstExampleClass, asdf), G_STRUCT_OFFSET (GstExampleClass, asdf), NULL, NULL,
gtk_marshal_NONE__POINTER, GTK_TYPE_NONE, 1, g_cclosure_marshal_VOID__POINTER, G_TYPE_NONE, 1,
GST_TYPE_EXAMPLE); GST_TYPE_EXAMPLE);
gtk_object_class_add_signals (gtkobject_class, gst_example_signals,
LAST_SIGNAL);
/* The last thing is to provide the functions that implement get and set /* The last thing is to provide the functions that implement get and set
* of arguments. * of arguments.
*/ */
gtkobject_class->set_arg = gst_example_set_arg; gobject_class->set_property = gst_example_set_property;
gtkobject_class->get_arg = gst_example_get_arg; gobject_class->get_property = gst_example_get_property;
} }
/* This function is responsible for initializing a specific instance of /* This function is responsible for initializing a specific instance of
@ -277,8 +276,8 @@ gst_example_chain (GstPad *pad, GstBuffer *buf)
gst_pad_push(example->srcpad,outbuf); gst_pad_push(example->srcpad,outbuf);
/* For fun we'll emit our useless signal here */ /* For fun we'll emit our useless signal here */
gtk_signal_emit (GTK_OBJECT (example), gst_example_signals[ASDF], g_signal_emit(G_OBJECT (example), gst_example_signals[ASDF], 0,
example); example);
/* If we're not doing something, just send the original incoming buffer. */ /* If we're not doing something, just send the original incoming buffer. */
} else { } else {
@ -290,7 +289,7 @@ gst_example_chain (GstPad *pad, GstBuffer *buf)
* enable the element to respond to various arguments. * enable the element to respond to various arguments.
*/ */
static void static void
gst_example_set_arg (GtkObject *object,GtkArg *arg,guint id) gst_example_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{ {
GstExample *example; GstExample *example;
@ -301,14 +300,14 @@ gst_example_set_arg (GtkObject *object,GtkArg *arg,guint id)
example = GST_EXAMPLE(object); example = GST_EXAMPLE(object);
/* Check the argument id to see which argument we're setting. */ /* Check the argument id to see which argument we're setting. */
switch (id) { switch (prop_id) {
case ARG_ACTIVE: case ARG_ACTIVE:
/* Here we simply copy the value of the argument to our private /* Here we simply copy the value of the argument to our private
* storage. More complex operations can be done, but beware that * storage. More complex operations can be done, but beware that
* they may occur at any time, possibly even while your chain function * they may occur at any time, possibly even while your chain function
* is running, if you are using threads. * is running, if you are using threads.
*/ */
example->active = GTK_VALUE_INT(*arg); example->active = g_value_get_int (value);
g_print("example: set active to %d\n",example->active); g_print("example: set active to %d\n",example->active);
break; break;
default: default:
@ -318,7 +317,7 @@ gst_example_set_arg (GtkObject *object,GtkArg *arg,guint id)
/* The set function is simply the inverse of the get fuction. */ /* The set function is simply the inverse of the get fuction. */
static void static void
gst_example_get_arg (GtkObject *object,GtkArg *arg,guint id) gst_example_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{ {
GstExample *example; GstExample *example;
@ -326,12 +325,12 @@ gst_example_get_arg (GtkObject *object,GtkArg *arg,guint id)
g_return_if_fail(GST_IS_EXAMPLE(object)); g_return_if_fail(GST_IS_EXAMPLE(object));
example = GST_EXAMPLE(object); example = GST_EXAMPLE(object);
switch (id) { switch (prop_id) {
case ARG_ACTIVE: case ARG_ACTIVE:
GTK_VALUE_INT(*arg) = example->active; g_value_set_int (value, example->active);
break; break;
default: default:
arg->type = GTK_TYPE_INVALID; G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break; break;
} }
} }
@ -345,7 +344,7 @@ plugin_init (GModule *module, GstPlugin *plugin)
GstElementFactory *factory; GstElementFactory *factory;
/* We need to create an ElementFactory for each element we provide. /* We need to create an ElementFactory for each element we provide.
* This consists of the name of the element, the GtkType identifier, * This consists of the name of the element, the GType identifier,
* and a pointer to the details structure at the top of the file. * and a pointer to the details structure at the top of the file.
*/ */
factory = gst_elementfactory_new("example", GST_TYPE_EXAMPLE, &example_details); factory = gst_elementfactory_new("example", GST_TYPE_EXAMPLE, &example_details);

View file

@ -60,7 +60,7 @@ struct _GstExampleClass {
}; };
/* Five standard preprocessing macros are used in the Gtk+ object system. /* Five standard preprocessing macros are used in the Gtk+ object system.
* The first uses the object's _get_type function to return the GtkType * The first uses the object's _get_type function to return the GType
* of the object. * of the object.
*/ */
#define GST_TYPE_EXAMPLE \ #define GST_TYPE_EXAMPLE \
@ -69,21 +69,21 @@ struct _GstExampleClass {
* is not the right type, a warning will be generated on stderr. * is not the right type, a warning will be generated on stderr.
*/ */
#define GST_EXAMPLE(obj) \ #define GST_EXAMPLE(obj) \
(GTK_CHECK_CAST((obj),GST_TYPE_EXAMPLE,GstExample)) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_EXAMPLE,GstExample))
/* The third is a checking cast of the class instead of the object. */ /* The third is a checking cast of the class instead of the object. */
#define GST_EXAMPLE_CLASS(klass) \ #define GST_EXAMPLE_CLASS(klass) \
(GTK_CHECK_CLASS_CAST((klass),GST_TYPE_EXAMPLE,GstExample)) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_EXAMPLE,GstExample))
/* The last two simply check to see if the passed pointer is an object or /* The last two simply check to see if the passed pointer is an object or
* class of the correct type. */ * class of the correct type. */
#define GST_IS_EXAMPLE(obj) \ #define GST_IS_EXAMPLE(obj) \
(GTK_CHECK_TYPE((obj),GST_TYPE_EXAMPLE)) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_EXAMPLE))
#define GST_IS_EXAMPLE_CLASS(obj) \ #define GST_IS_EXAMPLE_CLASS(obj) \
(GTK_CHECK_CLASS_TYPE((klass),GST_TYPE_EXAMPLE)) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_EXAMPLE))
/* This is the only prototype needed, because it is used in the above /* This is the only prototype needed, because it is used in the above
* GST_TYPE_EXAMPLE macro. * GST_TYPE_EXAMPLE macro.
*/ */
GtkType gst_example_get_type(void); GType gst_example_get_type(void);
#ifdef __cplusplus #ifdef __cplusplus